Well cementing method



Aug. 17, 1948. w. J. TRAVERS, JR WELL CEMENTING METHOD- 2 Sheets-Sheet 1Filed. Oct. 1.4, 1946 William 7i'lld6l'5,

Aug. 17, 1948. w. J. TRAVERS, JR WELL CEMENTING METHOD Filed Oct. 14,1946 2 Sheets-Sheet 2 W WW Patented Aug. 17, 1948 2,447,217

UNITED STATES oFFi cE 242,447,211 i 1 WELL CEMENTING METHOD William J.Travers, In, Los .Angeles, Calif assignor to :Richfield Oil Corporation,.Los Angles, Calif., a corporation of'Delaware ApplicationOctober l4,19.4.6, SerialNo. 703,224

lClaim. (Cl. 166-22) This/invention relates to a method of cementof-thecement preparatory to running the sleeve. ing an oil well for thepurpose of-tefjiecting a Figure 5 illustrates-cementing of thesleeve-inseparation of Zones in a producing interval. place; H In producing oilfrom somefields,.it is found Figure 6 illustrates the re-completion ofthe that an undesirable high gas-oil ratio is ob- 5 well, using theinstalled sleeve, and a tubing to tained. For the .purposeiof reducingthis high casing packer. gas-.oilratio it is-desirableto performacement- Figure '7 is a vertical section of a washingand ing operation ata point within the producing cementing tool employed in the method ofthe horizonior the purpose of :shutting-ofi the gas present invention.in=the .tqpipart of the hole from the producing Referring first to Fig..11 of the drawings, vI intervals. have illustrated thereindiagrammatically the Two practices have heretofore been used tocondition-of atypical well which-is to-be treated efiect such acementing operation at a point by the method of the present'invention.In the within the producing horizon. In the 'first of drawing, 2indicates a well-casing iwhich is cethese *procedures, where thereexists a blank mented', as indicated at 3. 'Below the casing .(notperforated) section of the :casingat a point there is hung theperforated liner '4, which exwhere the cementing, operations are to, bepertends through the producing formation of the formed, shut-off iseffected by forcing cement well. Within the wellthere is indicated theusuaround this blank section untilcontact between a-l production tubing5. When such a, well,

the casing and the, wallsof the :hOleiS fully ob- 3 completed asindicated in Fig. 1 is later found to tained. Thereafter the wellis;r.ecompleted with produce at a high gas-oilratio and it is desiredthe tubing to *casing :packer set in the blank to efiect theshutofioperation of the production section. Where there isno blanksection 'availastrata along some zone where the perforated ble .at .ornear the point where the shut-off is liner 4 is present, the processjisas follows:

desired, it has :been formerly .necessary to re- Theproduction from thewell is first killed by movezthe liner :fromthe well and install a newintroducing water into the well. There is then liner properlyequippedzinorder to allow the cepreferably introduced a'viscous mud,after which menting operation. :Such .an operation is very the tubing 5is pulled from the well. washpen iv I hav v l d a m th d by whi h ingand cementing tool'6, illustrated in Fig. 'Lis the :desired cementshut-.oii may be efiected at then installed on the lower end of thetubing. a p t in e producing hori on of a We l Whe The particular tubingillustrated is indicated .as there is present aperforated-casing, whichdoes including a section of tubing 1 having an upper I101? require eremoval of Such Pe at packer 8 and a'lower'packer 9, the'packers 8 andas n .Bbeing spaced apart asindicated to provide an annular zone betweenthe packers, which is in By the method .of the present invention, I

communication with the interior of the tube 5 have succeeded insuccessfully effecting a Sh t- 35 off atrthe desired point, v:decreasingthe Lgas-oil from'the perforation l ratio of the well at a costsubstantially reduced For the purpose-oi:iacilitating the movement omeither 0f h P r methodsof the washing and .cementingtools there is preieThe method of the present invention, together 40 erably provided a valvecontrolled bypass line with various other objects and advantages of thearound the packers For t purpose, th lower invention, will be fullyunderstood from the folend of t t b ng 5 (Fig, '7) is provided with a Og description of a preferred form examvalve seat H on which is adaptedto seat a ball l2 ple of the method. I have, therefore, described whenforced upwardly against the valve seat H, with reference t0 theaccompanying drawings, 5 having a retaining cage M which will retain thethe Preferred form of the Present invention valve for preventing thevalve from dropping off Referring to the drawings! the seat. Within thetubing 5 there is provided Figure 1 diagrammatically illustrates the theinner tube member 15 spaced from the tube 5 iti n f a w ll b f pp yin hr h pr and communicating with the exterior oi the tube ess of thepresent inventi n 50 i5 through an opening It above the packer 8. F ure2 illustrates a Washing Operation The Washing and cementing tool 8 isthus p-roploy in the method of the present inventionvided with a bypasspassage to permit the ready Figure 3 u a the cementing Operation flow ofwater, mud, or other fluid from the space step of the present invention.above the packer 8 to the space below the packer Figure 4 illustratescleaning out of a portion to 9. Movement of fluid, moreover, in thereverse direction t/hrough the bypass l5, may not be allowed to occur.

the tool is then run into the hole to the point along the perforatedliner 4, where the cementing operation is to be performed. Theperforations in the region of the portion to be cemented For exampleabout 50 feet is a suitable interval for the liner to be coveredin thewashing operation.

is illustrated the end of this the figure showing the tool 6 at thecemented. The [8. The tubing then withdrawn from the liner isintroduced, for the purpose of cementing the liner to bridge I 8, asillustrated in 4 Fig. 5. The drill pipe 20 is then disconnected from theblank sleeve 2|, which is then cemented in position, and the drill pipethe method here- WILLIAM J. TRAVERS, JR.

REFERENCES CITED The following references are of record in the file ofthis patent: 5 UNITED STATES PATENTS Number Name Date 1,758,156 HuberMay 13, 1930 526,346 Fay Sept. 18, 1894

